The presence of viruses and other pathogens in the environment
is an indicator of faecal pollution that poses a
potential risk to the exposed population, since such pathogens
do not constitute normal gastrointestinal microbiota,
and are only excreted by sick individuals [7].
Rotavirus is recognized as being responsible for diarrheal
disease in young children with a worldwide mortality rate
of 600,000 per year [8]. Astrovirus is also considered one
of the most important agents of viral gastroenteritis
[9,10], and is ranked second after rotavirus as the major
cause of diarrheal disease in young children and adults
[11]. While the actual contribution of rotavirus to total
incidence of diarrheal disease is between 25% and 52%,
astrovirus is much lower being responsible for between
5% and 10% of cases [12].
The presence of viruses and other pathogens in the environmentis an indicator of faecal pollution that poses apotential risk to the exposed population, since such pathogensdo not constitute normal gastrointestinal microbiota,and are only excreted by sick individuals [7].Rotavirus is recognized as being responsible for diarrhealdisease in young children with a worldwide mortality rateof 600,000 per year [8]. Astrovirus is also considered oneof the most important agents of viral gastroenteritis[9,10], and is ranked second after rotavirus as the majorcause of diarrheal disease in young children and adults[11]. While the actual contribution of rotavirus to totalincidence of diarrheal disease is between 25% and 52%,astrovirus is much lower being responsible for between5% and 10% of cases [12].
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